KCGLOBAL Mass Air Flow Sensor MAF 6-Pin 3L3A-12B579-BA / AFLS131 for Ford Lincoln Mazda — OEM Fit, New Unit

The KCGLOBAL Mass Air Flow Sensor (3L3A-12B579-BA / AFLS131) is a direct-fit, 6-pin replacement MAF sensor engineered to restore proper air-measurement for compatible Ford, Lincoln and Mazda vehicles.

This replacement mass air flow meter is designed to meet OEM fit and function while offering a brand-new unit rather than a rebuilt part. It reads the volume of incoming air so the engine control module can set correct fuel delivery; when a faulty MAF is the cause of drivability issues, replacing it with the correct part number and connector type can resolve error codes and rough-running conditions. Before installing, verify fitment against vehicle year and part references and clean the air box and filter to avoid false readings after replacement.

Which vehicles and part numbers does this MAF sensor replace?

This 6-pin MAF is specified to replace several OE numbers and fit multiple Ford and Lincoln applications across the mid-2000s. It covers common engine bays where the original equipment part is listed under matching part codes.

• Replaces OE codes: 86-50031, 3L3Z-12B579-BA, 3L3A-12B579-BA, AFLS-131 and variants such as 4515688, 1F7013210(A).
• Fits: Ford Focus (2004–2007), Fusion (2004–2007), Five Hundred (2005–2006), Taurus (2004–2006), Mustang (2005–2006), Thunderbird (2004–2005), Crown Victoria (2006).
• Also compatible with Lincoln models: Zephyr (2006), LS (2003–2006), Town Car (2005–2006), Mark LT (2006), Navigator (2006).

How does this replacement compare to the original equipment part?

This KCGLOBAL unit is manufactured as a brand-new component to match OEM dimensions and electrical connections so it installs without modification. It’s built from durable materials intended to maintain proper calibration and long-term function under normal operating conditions.

• 100% new, not rebuilt—minimizes risk of premature failure from reused components.
• Designed to meet OEM specifications for fit, form and function.
• Engineered with the correct 6-pin electrical plug to avoid wiring adapters.

What should I do before and after installing the MAF sensor?

Preparation and a few post-replacement checks help ensure the new sensor is recognized and performs accurately. Cleaning the air box and replacing a dirty air filter removes contamination sources that commonly cause MAF failures and persistent check-engine lights.

• Inspect and replace the engine air filter if dirty to prevent contamination.
• Clean the air box and intake tract so the new sensor isn’t exposed to debris.
• Clear stored trouble codes after installation and verify idle and throttle response.

Will this part resolve my check-engine light or drivability issues?

Replacing a worn or faulty MAF can correct symptoms caused specifically by inaccurate airflow readings, such as rough idle, hesitation or an illuminated check-engine light. However, diagnostic confirmation is recommended since similar symptoms may stem from other sensors or vacuum/leak issues.

• Restores correct air-volume signals to the engine control module when MAF is the root cause.
• If codes persist, further diagnostics may be needed—inspect vacuum lines, intake leaks, and related sensors.
• Ensure proper electrical connection and secure mounting during installation.

Who is this for: The KCGLOBAL 3L3A-12B579-BA (AFLS131) MAF sensor is intended for vehicle owners, mechanics and DIY technicians who need a new, direct-replacement mass air flow meter for compatible Ford and Lincoln models from the mid-2000s. Choose this part if you require an exact 6-pin connector, want a brand-new (not rebuilt) module, and are prepared to clean the intake system and verify fitment before installation.